Head to head
Marcus Kamen vs Simon Kellum
Two careers, 234 shared rounds, one running count. Everything below comes from the official results the two of them posted in the same rounds of the same competitions.
Marcus Kamen (United States) and Simon Kellum (United States) have met in 234 rounds across 26 competitions since 2016. Counting every round where both finished with a result, Simon Kellum leads Marcus Kamen: 164 finishes in front to 70.
On personal bests the split is just as plain: across 15 shared events, Simon Kellum holds the faster single in 15, Marcus Kamen in 0.
Personal bests, side by side
faster single in bold| Event | Marcus Kamen single | average | Simon Kellum single | average |
|---|---|---|---|---|
| 3×3 | 5.96 | 7.80 | 4.91 | 7.06 |
| 2×2 | 1.12 | 2.14 | 0.71 | 1.44 |
| 4×4 | 31.21 | 38.16 | 29.24 | 35.27 |
| 5×5 | 1:13.98 | 1:22.32 | 55.69 | 1:04.66 |
| 6×6 | 2:50.87 | 2:56.63 | 1:53.03 | 2:06.17 |
| 7×7 | 4:46.75 | 4:54.54 | 2:57.72 | 3:15.06 |
| 3×3 blindfolded | 2:19.72 | 2:45.61 | 39.08 | 1:02.97 |
| 3×3 Fewest Moves | 29 moves | 32.00 | 19 moves | 20.67 |
| 3×3 one-handed | 12.24 | 14.34 | 8.49 | 11.90 |
| Clock | 6.34 | 8.26 | 4.00 | 4.88 |
| Megaminx | 1:10.30 | 1:16.44 | 39.37 | 45.94 |
| Pyraminx | 1.09 | 1.76 | 0.73 | 1.53 |
| Skewb | 2.28 | 4.03 | 0.85 | 1.71 |
| Square-1 | 20.69 | 25.92 | 6.65 | 10.13 |
| 3×3 Multi-Blind | 2 of 2 cubes · 17:11 | — | 10 of 12 cubes · 56:45 | — |
Year by year
every meeting, 234 rounds in allRecent meetings
newest first · averages where the round ranked on one, singles otherwise| Year | Competition | Event | Round | Marcus Kamen | Simon Kellum | ahead |
|---|---|---|---|---|---|---|
| 2026 | Rubik's WCA North American Championship 2026 | 2×2 | Second round | 2.69 | 2.65 | Simon Kellum |
| 2026 | Rubik's WCA North American Championship 2026 | 2×2 | First round | 2.50 | 2.36 | Simon Kellum |
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 | Second round | 9.64 | 7.60 | Simon Kellum |
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 | First round | 8.94 | 8.63 | Simon Kellum |
| 2026 | Rubik's WCA North American Championship 2026 | 3×3 one-handed | First round | 16.63 | 12.94 | Simon Kellum |
| 2026 | Rubik's WCA North American Championship 2026 | 4×4 | First round | 39.83 | 36.71 | Simon Kellum |
| 2026 | Rubik's WCA North American Championship 2026 | Pyraminx | First round | 2.00 | 2.10 | Marcus Kamen |
| 2026 | Rubik's WCA North American Championship 2026 | Pyraminx | Final | 2.78 | 2.65 | Simon Kellum |
| 2026 | Rubik's WCA North American Championship 2026 | Pyraminx | Second round | 2.08 | 2.14 | Marcus Kamen |
| 2026 | Rubik's WCA North American Championship 2026 | Skewb | First round | 5.19 | 2.89 | Simon Kellum |
| 2025 | Rubik's x TheCubicle CubingUSA All-Stars 2025 | Pyraminx | First round | 3.07 | 2.55 | Simon Kellum |
| 2025 | Rubik's x TheCubicle CubingUSA All-Stars 2025 | Pyraminx | Final | 2.02 | 2.16 | Marcus Kamen |
| 2025 | Rubik's WCA World Championship 2025 | 2×2 | First round | 2.95 | 2.95 | Simon Kellum |
| 2025 | Rubik's WCA World Championship 2025 | 3×3 | First round | 10.60 | 9.81 | Simon Kellum |
Full careers: Marcus Kamen · Simon Kellum. A meeting is a round of one event at one competition where both finished with a counted result. Who finished ahead follows official placing in the round: rounds played to an average are won on the average, best-of rounds on the single.